<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>引入样式表</title>
		<!-- 引入样式表 html语法步骤：1.head元素加style -->
		<style>
			/*css语法步骤 2.在style加@imort url(css/xxx.css);*/
			@import url(css/头部.css);
			@import url("css/尾页.css");
			/*理解内部样式表——td加样式*/
			td{
				background: #aaaaff
			}
			
		
		</style>
	</head>
	<body>
		<div>头部</div>
		<table>
			<tr>
				<td>1</td>
				<td>1</td>
			</tr>
		</table>
		<table>
			<tr>
				<td>2</td>
				<td>3</td>
			</tr>
		</table>
	</body>
</html>